Lithium battery protection plate

Abstract

The utility model discloses a lithium battery protection board, lithium battery protection board includes protection board main part, hollowly sets up a groove in protection board main part, the fan that is used for heat dissipation is arranged in the groove, the both sides of groove are provided with pad, the fan is connected above pad through support, the fan is higher than the groove setting to make the air volume diffusion from the groove support between to protection board surface. Through setting the fan high in the air in the groove, utilize pad to make the space between fan bottom and groove height, make airflow diffuse to two directions simultaneously. A part of airflow passes through groove directly and cools battery module downward, another part of airflow diffuses horizontally, covers and cools all heat -generating components such as protection IC, MOS pipe, resistance and condenser on the upper surface of protection board main part, realizes efficient air cooling heat dissipation to protection board, fundamentally solves the high temperature work hidden danger.

Description

Technical Field

[0001] This utility model relates to the field of protection board technology, and in particular to lithium battery protection boards. Background Technology

[0002] With the rapid development of portable electronic devices, electric vehicles, and energy storage systems, lithium batteries have been widely used due to their high energy density and long cycle life. As a core component of the battery management system, the lithium battery protection board monitors and protects against overcharging, over-discharging, overcurrent, and short circuits in real time. Its reliability directly affects the safety of the entire battery system.

[0003] When the protection board is in operation, its components, such as the protection IC (integrated circuit) and MOSFET (metal-oxide-semiconductor field-effect transistor), generate a significant amount of heat due to the continuous flow of high current. This heat accumulation is particularly pronounced under high-rate charge and discharge conditions. If the heat cannot be dissipated in time, the temperature of the protection board will rise sharply. Excessive temperature not only accelerates the aging of electronic components, reducing their reliability and lifespan, but more seriously, it may cause the protection IC to malfunction or the MOSFET to thermally break down, thereby rendering the protection function ineffective and leading to safety accidents such as battery overheating, combustion, or even explosion, posing a huge safety hazard. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a lithium battery protection board. To solve the above-mentioned technical problems, the present invention provides the following technical solution: a lithium battery protection board includes a protection board body, a hollow groove is provided on the protection board body, a fan for heat dissipation is provided in the groove, pads are provided on both sides of the groove, the fan is connected above the pads by a bracket, and the fan is positioned above the groove so that the airflow can diffuse from between the groove brackets to the surface of the protection board.

[0005] In the above-described scheme, preferably, the bracket includes a cover, which is connected to the pad by an extension plate.

[0006] In the above scheme, preferably, the bracket further includes a crossbar that passes through the center of the cover and is fixed to the pad.

[0007] In the above scheme, preferably, the fan is rotatably connected to the center of the crossbar.

[0008] In the above scheme, preferably, the protection board includes a protection IC, several MOSFETs, several resistors and several capacitors, and the slot is disposed between the protection IC and the MOSFETs.

[0009] In the above scheme, preferably, a heat dissipation plate is provided at the bottom of the protection plate.

[0010] In the above scheme, preferably, the heat sink is provided with a plurality of wind baffles, and the wind baffles are provided with ventilation holes for ventilation.

[0011] In the above scheme, preferably, the windbreak block is arranged in a ring around the periphery of the trough.

[0012] In the above scheme, preferably, a barrier is provided on the outside of the heat sink.

[0013] The beneficial effects of this invention are as follows: By suspending the fan above the slot and using pads to increase the space between the bottom of the fan and the slot, airflow can diffuse in two directions simultaneously. Part of the airflow flows downwards through the slot to directly dissipate heat from the battery module; the other part diffuses laterally, fully covering and cooling all heat-generating components on the upper surface of the protection board, such as the protection IC, MOSFETs, resistors, and capacitors. This achieves highly efficient air cooling of the protection board, fundamentally solving the potential problem of high-temperature operation. Attached Figure Description

[0014] Figure 1 This is a breakdown diagram of the components of this utility model.

[0015] Figure 2 This is a perspective view of the present utility model.

[0016] Figure 3 This is a top view of the present invention.

[0017] Figure 4 for Figure 3 AA-direction sectional view Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-4 The lithium battery protection board 1 is mainly used to protect lithium battery packs from overcharge, over-discharge, overcurrent and short circuit. It also effectively reduces the temperature of the protection board 1 during operation through the built-in heat dissipation structure, thereby improving its reliability and service life.

[0019] The lithium battery protection board 1 includes a rectangular protection board body, on which are mounted electronic components necessary for lithium battery management, such as a protection IC, multiple MOSFETs, resistors, and capacitors. To optimize heat dissipation, a recessed, hollow groove 2 is provided between the protection IC and the heat-generating components such as the MOSFETs. The groove 2 extends through the thickness direction of the protection board body, forming an opening that allows airflow.

[0020] Furthermore, the fan 3 used for heat dissipation is installed in the tank 2 via the bracket 5. A pad 4 is provided on each of the two symmetrical sides of the tank 2. The bracket 5 is fixed to the upper part of these two pads 4, suspending and supporting the fan 3 above the tank 2.

[0021] The support 5 includes a roughly circular cover 6, which is fixedly connected to the pads 4 via horizontally extending plates 7 on both sides. Furthermore, the support 5 includes a crossbar 8, which passes through the center of the cover 6 and is also fixed at both ends to the pads 4 on both sides, thereby enhancing the stability of the overall structure. The fan 3 is rotatably connected to the crossbar 8 via a central bearing, thus suspending itself directly above the slot 2.

[0022] Due to the pad 4, the installation height of the fan 3 ensures that the lowest point of its blades remains above the upper surface of the main body of the protection board 1, thus maintaining a certain vertical space between the bottom of the fan 3 and the slot 2. When the fan 3 is driven to rotate, the generated airflow not only flows downward through the slot 2 to cool the lithium battery installed below it, but also, due to the suspended installation of the fan 3, some airflow diffuses laterally in all directions from the gap between the edge of the fan 3 and the bracket 5, and from the space between the bottom of the fan 3 and the slot 2. This laterally diffused airflow can effectively blow across the upper surface of the main body of the protection board 1, directly cooling the heat-generating components such as the protection IC, MOSFET, resistors, and capacitors arranged on it, achieving bidirectional heat dissipation for the protection board 1 itself.

[0023] To further enhance heat dissipation, a metal heat sink 11 is fixedly installed at the bottom of the main body of the protective plate 1. The heat sink 11 not only helps to conduct and diffuse heat, but also has several raised wind deflectors 12 on its side facing the airflow.

[0024] The wind deflectors 12 are arranged in a ring array around the opening of the trough 2. Each wind deflector 12 has multiple ventilation holes 13. When airflow blows from the trough 2 onto the heat sink 11, these wind deflectors 12 and their ventilation holes 13 can turbulentize and redistribute the airflow, breaking laminar flow and forming turbulent flow, thereby significantly improving the heat exchange efficiency between the heat sink 11 and the air.

[0025] Finally, a vertically upward-facing baffle 14 is provided around the outermost edge of the heat sink 11. The function of the baffle 14 is to restrict the flow range of the lateral airflow, prevent the airflow from dissipating too quickly, ensure that the airflow can be in contact with the surface of the heat sink 11 for a longer period of time, and also guide the airflow to areas that need more heat dissipation, thereby further optimizing the overall heat dissipation performance.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lithium battery protection board (1), characterized in that: The device includes a protective plate (1) body, on which a hollow groove (2) is provided. A fan (3) for heat dissipation is provided in the groove (2). Pads (4) are provided on both sides of the groove (2). The fan (3) is connected above the pads (4) through a bracket (5). The fan (3) is set higher than the groove (2) so that the air volume can be diffused from between the groove (2) and the bracket (5) to the surface of the protective plate (1).

2. The lithium battery protection board (1) according to claim 1, characterized in that: The bracket (5) includes a cover (6) which is connected to the pad (4) by an extension plate (7).

3. The lithium battery protection board (1) according to claim 2, characterized in that: The bracket (5) also includes a crossbar (8) which passes through the center of the cover (6) and is fixed to the pad (4).

4. The lithium battery protection board (1) according to claim 3, characterized in that: The fan (3) is rotatably connected to the center of the crossbar (8).

5. The lithium battery protection board (1) according to claim 1, characterized in that: The protection board (1) includes a protection IC, several MOS transistors, several resistors and several capacitors, and the groove (2) is disposed between the protection IC and the MOS transistors.

6. The lithium battery protection board (1) according to claim 1 or 5, characterized in that: A heat sink (11) is provided at the bottom of the protective plate (1).

7. The lithium battery protection board (1) according to claim 6, characterized in that: The heat sink (11) is provided with a plurality of wind baffles (12), and the wind baffles (12) are provided with ventilation holes (13) for ventilation.

8. The lithium battery protection board (1) according to claim 7, characterized in that: The windbreak block (12) is arranged in a ring around the periphery of the trough (2).

9. The lithium battery protection board (1) according to claim 6, characterized in that: A barrier (14) is provided on the outside of the heat sink (11).

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